isalnum
isalnum_l
isalpha
isalpha_l
isascii
isblank
isblank_l
iscntrl
iscntrl_l
isdigit
isdigit_l
isgraph
isgraph_l
islower
islower_l
isprint
isprint_l
ispunct
ispunct_l
isspace
isspace_l
isupper
isupper_l
isxdigit
isxdigit_l
toascii
tolower
tolower_l
toupper
toupper_l